Let's get right to the latest on Oscar of the stories the Olympic hero accused now of murder this morning. There are new allegations about what happened the night he allegedly shot his model girlfriend to death. ABC's Bob because Johnny is in Pretoria South Africa with the very latest -- Good morning Amy and Oscar historian spent -- -- in this. In jail police sources are -- I've been using steroids and a -- rose to fame for triumph over adversity the battle has never been missed. Paralympic champion Oscar historians known as the blade runner will no longer be running races his agent saying Sunday night. All of the track star's future events have been canceled. As he focuses on defending himself. Against charges he murdered his girlfriend model -- -- camp. On Valentine's Day overnight the story -- his father is quoted in the south African paper the Sunday Times saying his countrymen are destroying and national icon. We build people up and -- -- who overcome immense challenges only to take great goalie Ian breaking them down. The stories his family and friends insist he is not guilty we have no doubt he's no substance for the allegations. His best friend telling reporters a distraught historians called him just before for an. To say it there has been a terrible accident I shot Riva. Those closest to the stars say he mistook her for an intruder but new -- -- are casting doubt on that explanation. While police refused to comment to ABC news on -- claims. One respected local newspaper city press reports multiple police sources have said. That a bloody cricket -- will be a key piece of evidence possibly -- in a violent argument before the shooting. That -- -- was wearing a nightgown -- her overnight bag was found at the house that historians that may have first shot Eckstein company in the bedroom. And that she may have then fled to the bathroom where she was shot three more times through the door. These shocking new claims come just a day after the premiere of a reality show the 29 year old victim had recently taped. He included a special tribute and her now hunting last words are recorded for the -- for waiting. Hugo acts and making it sits beside importance if he even made an impact in a positive way negative way I'm gonna miss people -- And I thinks about the -- from South Africa.

This transcript has been automatically generated and may not be 100% accurate.